/*
 * Copyright the original author or authors.
 * 
 * Licensed under the MOZILLA PUBLIC LICENSE, Version 1.1 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.mozilla.org/MPL/MPL-1.1.html
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.kairos.utils.monitor
{
	import com.bourre.structures.Range;
	import com.kairos.engine.RTEvent;
	
	import flash.utils.getTimer;
	
	/**
	 * 
	 * @author Cédric Néhémie
	 * 
	 */
	public class FPSField extends AbstractMonitorField implements MonitorField
	{
		protected var _nTime:Number;
		protected var _nCount:Number; 
		protected var _nStartTime : Number;
		
		public function FPSField( dr : Range = null, col : Number = NaN )
		{
			super( "FPS" , 0, "fps", dr, col);
			_nStartTime = getTimer();
			_nCount = 0;
			_nTime = 0;
		}
		public override function registerValue ( e : RTEvent ) : void
		{
			_nLastValue = _nValue;
			
			_nTime += getTimer() - _nStartTime;
			_nStartTime = getTimer();
			_nCount++;
			
			if( _nTime > 1000 )
			{
				_nValue = _nCount;
				_nCount = 0;
				_nTime -= 1000;
			}
		}
	}
}